Closure for gas-containers.



R. H. CAMPBELL. CLOSURE FOR GAS CONTAINERS. APPLICATION FILED APR.22, 1910.

Patented Mar. 7, 1911.

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Z Z EZZJ wfw "5C4 ATTORNEYS R. H. CAMPBELL. CLOSURE FOR GAS CONTAINERS APPLICATION FILED APR.22, 1910.

Patented Mar. 7, 1911.

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4&0 Arromvzrs ROBERT HUNTER CAMPBELL, or EDMONTON, ENGLAND.

CLOSURE FoE GAS-CONTAINERS.'

Specification of Letters Patent.

Patented Mar. '7, 1911.

Application filed April 22, 1910. Serial No. 557,083.

To all whom it may concern:

Be it known that I, ROBERT HUNTER CAMPBELL, a subject of the Kin of Great Britain and Ireland, of Angel oad, Edmonton, in the county of Middlesex, England, have invented a new and useful Closure for Gas-Containers, of which the following is a specification.

My invention relates to containers,-or capsules, for compressed, or liquefied gas which is liberated from the containers by piercing a closure, and the object of my invention is to provide containers of the kind commonly, known as sparklets with improved and very simple and economical closing means which will enable the container body to be used repeatedly with facility and economy.

According to my invention the neck of the container is provided with a closing washer, or cap which is capable of being readily perforated and which is loose, and entirely separate from the other parts.

threaded piece with central opening is provided to be screwed onto, or into, the .neck of the said container to hold the cap in place. The cap is so formed that while in place and before the threaded piece has-been screwed home, passages are afl'orded to allow the gas to pass from the central opening in the said screwed piece, over and under the cap, and through the neck into the container. while" when the said screwed piece is turned home hard, after. the container is charged, the cap is pinched or compressed between the said screwed piece and a bearing on, or in, the neck, andthe passages thus closed sothat said cup forms. a tight closure for the container. en the gas has been liberated from the container, by perforating the cap, the threaded piece is unscrewed and the pierced cap isremoved and a new one is put in its place to allow. of recharging and closing the container as before.

' The'cap may bem'ade in any suitable way which will leave passages through which gas can pass it in charging the container and which will allow of being-pinched down or compressed. upon a seating by fully screwing down the threaded piece so as to close, gas-tightly. these passages. The cap may, for example, be formed with a depending recessed edge or with slight projections on its opposite faces. It is further-more preferably formed with a thin readily perforated mid-portion and with thickened edges.

the cap under the pressure of the threaded member.

The accompanying drawin represent my invention, but it is to be understood that I do not limit myself to the precise details illustrated.

Figure 1 is an elevation of a closed container; Figs. 2 and 3 are vertical sections, drawn to an enlarged scale of the upper part of the container, Fig. 2 showing the parts in the position when the container is being charged; and Fig. 3 showing the container charged and closed; Figs. 4 and 5 show the closing cap separately in transverse section and plan; Fig. 6 shows the screwed securing piece separately in vertical section;

Figs. 7, 8, 9 and 10 show modifications in sections corresponding to- Figs. 2 and 3, and Figs. 11 and 12 show, in transverse section and plan respectively, the cap used in the modification Figs. 9 and 10.

Referring to Figs. 1 to 6, the neck 1 of the container isscrew-thread'ed and is formed with a ridge 2 having aspace 3 around it. The loose and separate cap 4 is shown as being made with a depending flange 5 having in it openings. When the cap 4 is placed over the ridge 2. the said flange rests upon thebottom of the space 3, and the cap 4 is supported so that it is a little above the ridge 2. A securing piece 6 is screwed upon the neck 1, this piece'6 being provided with an annular inwardly projecting part 7, which lies over the outer part of the cap 4. A central passage 8 is formed through the said piece 6 and its exterior is adapted to fit into the nozzle of a charging appliance. When the said piece 6 is screwed on before filling the container, it is not scrweded fully home but sp'ace'is' left (as shown in Fig. 2) between the part 7 and the cap 4, so that,.in

charging. the gas can pass from the central 1 opening 8 in the piece 6, over the cap 4 into the space 3, thence through the openings 15 in the flange of the cap 4 and into the con:

tainer from between the underside of the cap 4 and the ridge 2. When charging has been effected the piece "6 is screwed home onto the neck and forces the cap 4, against the ridge 2, crushing-the flange 5 against-the bottom of the space 3, so that all passages are closed and the cap is held firmly between the projecting part 7 of the piece 6 and the ridge 2, thus forming a tight closure for the container. as shown in Fig. 3. A. loose bearthe la ter tending to prevent the fracture of ing ring 9 may baprovided between the cap 40 for ,said cap afibrding 4: and the projecting part 7 of the piece 6,"

to prevent the cap 4 being dragged around and fractured when the piece 6'is screwed home. I Figs. 7 and 8 show an arrangement wherein the piece 6 is screwed into, instead of onto, the neck 1. As the parts whichv correspond with those shown in Figs. 2 and 3 are marked with the same reference numeralsythis modification will be well understood without further description. V

Figs. 9 and 10 show a modification wherein the cap 4 is stamped up so as to have a thickened edge 10, provided with projections 5, which serve to maintain the'pas-- sages past the cap 4 in charging, the thickened edges preventing all-possibility of. the cap being fractured on screwing home the piece 6. When the said piece 6 is screwed home the projections 5 are crushed and the cap 4 is pinched tightly between the edge of the neck of the container and the projection 7 on the piece 6, and thus effects a perfect closure of the container or capsule.

When the contents of the container have been used the piece 6 can be readily removed I and the pierced cap 4 removed and replaced by a new cap, whereupon the contafiier can be again charged with compressed, or liquefied, gas and be closed as hereinbefore-described.

Having now particularly described and ascertained the nature ,ofmy said invention,

' and in what manner the same is to be performed, I declare. that what I cIaim-is:

i I. In containers inletaperture, with surroundin seat for a closure member, a cap closure a apted to be pressed upon-said. seat, a crushable support an inlet passage beneath the latter to the interior of the container, in combination with a'member bearingi upon sai'd cap and means for forcing sai the latter. to its seat by crushing its support,

whereby a gas tight closureis effected, substantially as described. Y a

2. A container for compressed-gas having a threaded neck with seat for a closure member surrounding the inlet aperture of said .neck, a cap closure adapted to be pressed upon said seat, a crushable support for said cap affording a passage beneath the latter to the inlet aperture, in combination with a for compressed "gas, an

pressed upon with a member bearing upon said cap and member down upon said cap to press- .by a gas-tlght closure 'tially as described.

neck, a cap closure adapted to be pressed upon said seat, a crushable support for said cap afiording a passage beneath the latter to the inlet aperture, in combination with a member with central aperture and inwardly projecting flange bearing upon said cap' and threaded to engage said threaded neck,. whereby upon screwing down said threaded member said cap may be forced to its seat by crushing its support, substantially as described.

4:- A container for compressed gas having a threaded neck with seat for a closure member surrounding the inlet aperture of said neck, a cap closure adapted to be pressed upon said seat, a crushable support for said cap affording a passage beneath the latter to the inlet aperture, in combination with a member bearing upon said cap and threaded to engage said threaded neck, whereby upon screwing down said threaded member, said cap may be forced to its seat by crushing its support, together with a bearing washer interposed between said member and the cap, for the purpose specified.

5. In containers for compressed 'gas, an inlet aperture with surrounding seat for a closure member, a cap closure adapted to be said seat, said cap having crushable supporting projections affording an inlet passage beneath the latter to the interior of the container, in combination means for forcing said member down upon said cap to press the latter to its seat by crushing said supporting projections, Whereis effected, substan- Y In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

Q ROBERT HUNTER CAMPBELL.

Witnesses:

CHARLES W. OROCKER, H. D. JAMIJSON. 

